Generous couple give pregnant US waitress $1255 tip

A pregnant US waitress has got her own Christmas miracle after a generous couple left her a $1255 (US$900) tip.

Like many waitresses in America, Sarah Clark relies on tips to make a living due to poor wages in the hospitality industry.

Clark told CBS she was shocked when she picked up the receipt from a couple who had visited the Phoenix, Arizona café where she works.

Couple's generous tip to US waitress. (Source: Twitter) ()

“This is God’s money - he gave it to us so we could give it to you. God bless,” the couple wrote on the bill which came to $85.48 plus their $1255 tip.

"I couldn’t believe what I was looking at first because it was such a high amount - $900 is a lot of money. And it took a while for it to set in, and once it did, I cried for a little while," she said.

Clark, who is nine-months pregnant, said her husband is due to go in for surgery and has been unable to work.

"You always hear about these things happening, but you never expect to be the recipient of it," the waitress said.